Enigica look to be following typical Italian exotica. It’s a premium/performance motorcycle with premium parts, breaks, suspension, handling etc.
Zero seem more middle of the road. Not designed to be exotica, not designed with premium breaks, suspension, not designed for all out performance/handling, it’s a general purpose motorcycle designed for urban environments.
I think Enigica and Zero are trying to target different segments and Enigica is targeting a segment above Zero. The sportier side.